Toyota CH-R Service Manual: Terminals Of Ecu

Toyota CH-R Service Manual / Seat Belt / Seat Belt Warning System(w/o Occupant Classification System) / Terminals Of Ecu

TERMINALS OF ECU

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

*A

Main Body ECU (Multiplex Network Body ECU) with 1 Connector

-

-

*A

Main Body ECU (Multiplex Network Body ECU) with 2 Connectors

-

-

(a) Disconnect the main body ECU (multiplex network body ECU) connectors.

Click here

(b) Measure the resistance and voltage according to the value(s) in the table below.

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

MB-31 (BECU) - Body ground

-

Battery power supply

Always

11 to 14 V

MB-32 (IG) - Body ground

-

Ignition power supply (IG signal)

Ignition switch ON → off

11 to 14 V → Below 1 V

MB-30 (ACC) - Body ground

-

Ignition power supply (ACC signal)

Ignition switch ACC → off

11 to 14 V → Below 1 V

MB-11 (GND1) - Body ground

-

Ground

Always

Below 1 Ω

MB-18 (DBKL) - Body ground

-

Driver seat belt buckle switch signal

Driver seat belt fastened

10 kΩ or higher

Driver seat belt unfastened

Below 1 Ω

MB-2 (RCTY) - Body ground

-

Rear door courtesy light switch RH input

Rear door LH closed (OFF)

10 kΩ or higher

Rear door LH open (ON)

Below 1 Ω

MB-13 (LCTY) - Body ground

-

Rear door courtesy light switch LH input

Rear door RH closed (OFF)

10 kΩ or higher

Rear door RH open (ON)

Below 1 Ω

CHECK COMBINATION METER ASSEMBLY

(a) Disconnect the F4 combination meter assembly connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

F4-40 (B) - Body ground

SB - Body ground

Battery power supply

Always

11 to 14 V

F4-39 (IG+) - Body ground

P - Body ground

IG power supply

Ignition switch ON → off

11 to 14 V → Below 1 V

F4-21 (ET) - Body ground

W- B - Body ground

Ground

Always

Below 1 Ω

F4-7 (PKBI) - Body ground

GR - Body ground

Front passenger seat belt buckle switch signal

Ignition switch ON, front passenger side seat belt fastened and front passenger seat occupied

10 kΩ or higher

Ignition switch ON, front passenger side seat belt unfastened and front passenger seat occupied

Below 1 Ω
    Data List / Active Test
    DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the following table, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when de ...

    Driver Side Seat Belt Warning Light does not Operate
    DESCRIPTION The combination meter assembly blinks or turns off the seat belt warning light on the combination meter assembly in accordance with the state of the front seat inner belt assembly (dr ...

    Other materials:

    Toyota CH-R Service Manual > Lighting System: Low Beam Headlight Circuit
    DESCRIPTION The main body ECU (multiplex network body ECU) controls the low beam headlights. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses and bulbs for circuits related to this system before performing the following procedure. Before replacing the main body ...

    Toyota CH-R Service Manual > Air Conditioning System(for Automatic Air Conditioning System With Side-mounted Air Conditioner Pressure Sensor): Precaution
    PRECAUTION IGNITION SWITCH EXPRESSIONS (a) The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this section. Expression Ignition Switch (Position) Engine Swi ...

    Toyota C-HR (AX20) 2023-2025 Owner's Manual

    Toyota CH-R Owners Manual

    Toyota CH-R Service Manual

    © 2017-2025 Copyright www.tochr.net
    0.0067